Riveting machine



' Dec. 12, 1944. I

T. H. SPELLER RIVETING- MACHINE 4 Sheets-Sheet 1 Filed Jan. 31, 1941 W a ,w, w H M I M Q m 9% T. H. SPELLER RIVETING MACHINE Dec. 12, 1944.

' 4 Sheets-Shet 2 Filed Jan. 31 1941 'IIIIIIIIIL 4 3' 1 /0 Even for;

Dec. 12, 1944. T. SPE L R 2,365,147

RIVETING MACHINE Filed Jan. 31, 1941 I 4 Sheets-Sheet 3 I I l M l I d7 ram.

Patented Dec. 12; 1944 I RIVETING MACHINE Thomas H. Spellen Williamsville; N. Y.,.assignor,

by mesnc assignments, to Wilbur Johndrew,

Buffalo, N. Y.

ApplicationJanuary 31, 1941,

30' Claims.

My device relates in general to riveting machines and particularly tothat type in which the riveting is accomplished by compression.

It is well known to those skilled in the art that in certain industries, as for instance the ainplane I industry, parts are fastened together by means of numerous rivets, anditis Very important that the height of the rivet heads be accurately de-' termined and uniformly maintained.

The principal object of my invention has been to provide a device of thisnatu're in whichthe height of the head of the rivet being upset shall be the determining factor in gauging the dimen- Serial No. 376,789

(orde -48$ l switches of my structure and the electrically controlled means connected therewith.

Fig; -11 is'a longitudinal, sectional'view of a modified form of rivet control means.

- Fig. 12 is a transverse, sectional view thereof taken on line l2-l2 of Fig. 11.

"Fig. 13 is an elevation, partly in section, of a portion of another modified form'of device.

My device comprises a frame having an upper jaw 2| and a lower jaw 22.

The lower jaw is provided with an axial-bore sions thereof and in which such height may be accurately kept within predetermined limits.

Another object has been to provide a device in which the stroke of the ram may be instantly changed from a regular operating stroke to a stroke of greater distance for the purpose of loading.

A further object is to provide index means for the anvils on machinesdesigned for riveting a row of rivets at the same time, whereby the an: vils may be quickly and conveniently positioned to best accommodate the work being handled.

Furthermore, it ha been an object to provide a device in which the height determining mechanism for the rivet head shall be governed by the relative movement of the movable anvil and the pressure rail. I

Further, my device is provided with a number of electric switches whereby the manipulation of the device is made certain, safe and convenient.

Moreover, means are provided in my device for assuring the return of the movable anvil to 1 the full limit of its downward stroke after the rivet head has been finished.

The above objects and advantages have been accomplished by the device shown in the accompanying drawings, of which: Fig. 1 i a side elevation ofthe preferred form of complete machine.

'23 within which is slidablymounted the ram 29 of my device. This ram is recipro-cated vertically by means of toggle links 25 and 26, joined together at their adjacent ends in a cylindrical joint 30. The lower end of the link 26 is oscillatably mounted upon a bearing cylinder 3| carried b-ya stationary part of the frame. The upper end ofthe link 25"is reciprocally attached to a bearing cylinder '32 carried by the ram 24. The links are held in .place against their respective bearing cylinders by means of plates 33 which are secured to the links and which are each engageablewith trunnion extensions 35 car-- ried by the bearingcylinde'rs. The upper toggle link 25 is provided with toggle link extension 36 which projects downwardly beyond the joint between the-two toggle links and to the lower end of which is 'pi'vot'ally attached the piston rod 40 of the operating cylinder H of the device. This operating cylinderispi'votally mounted at its outer end upon a pin dz'which is stationarily ar- Fig. 2 is an enlarged, longitudinal section taken on the vertical centerline of the ram.

Figs. 3 and 4 are enlarged, fragmentary, sectional views showing, respectively, the rivet inserted in the work pieces and partially upset.

Fig. 5 is a similar view showing the rivet head finished and-also showing a view of the associated parts.

Fig. 6 is an enlarged, side elevation partly in section of "the upper and lower anvils.

Fig. 7 is a 'sectionalview of the lower anvil taken on line l1 of Fig. 6.

Fig. 8 is 'a transverse, sectional view on line a a of Fig. 2.

Fig. 9 is an enlarged face view of the rivet control switch adjusting means.

.Fig. 10 is a diagrammatic view showing the electrical connections of the various electric to the thickness of the workpieces.

rangedwithin the housing Zll of the device, thereby permitting' the' cylinder to oscillate as the piston movesfo'rwardlyhnd backwardly in the actuation of the to le links. The operating cylinder is provided'with a ipip'e'connection 43 at the forward end thereof and "a pipe connection 44 at the rear end thereof which actv as inlet and exhaust passageways for the. entrance and exhaust of air under pressure supplied to the operating cylinder during theoperation thereof. These pipes are connected to a solenoid valve 4515c be hereinafter described. The lower end of the link extension 36 is provided withalatch surface 46 terminating in an edge 50 for engagement with the latch arm 51' of toggle latch 52, to be here'- inaft'er, described.

Carried by'the upper'jaw 2| and by the ram 241's the upper anvil 5'3 and the lower anvil 54, respectively. The 'upper and lower anvils are carried by anvil mounting plates 55 and 51', respeotively. Shims 34' are preferably provided, and these' are located between the upper anvil and the upper mounting plate 55, whereby the relative positions of the anvils may be adjusted I V The plate 55 is secured to an anyil index plate 58 and is 'heIdfin ot'atabIe manner against the upper 3 W Zljby means of a' retaining ring 59'. The

plate 51 carrying the lower anvil is secured to an anvil index plate 60 which is rotatably attached to the upper surface of the ram by means of a retaining ringlil. Each of the anvil index plates is formed with a series 'of equidistantly spaced apertures or recesses 63 with which spring-pressed index detents 64 are engageable. The detents for the upper plate are carried by the jaw 2| and the detents for the lower index plate -are "carried by the ram 24. Each of the index plates 58 and 68 is provided with a handle 62 whereby they may be rotated relative to the upperiiaw 2|.and ram 24 to quickly and conveniently position the anvils so as to register with the rows'orr'ivets carried by. the workpieces.

My device is :provided with .dimensionalacontrol means consisting preferablysofra pressure rail 65 which isslidablyxmountedeon thelower wanvil .54. The upper. edge :66 hi the pressurerail is held above the upper; edge '10. of the lower anvil by means .of helical :springs .14 which-are mounted in .recesses .12 ..;iormed in the -lower :anvil. The springs of the twowend recesses :bear against the lower anvil amounting plate 51 at their lower ends :and against the flange 13 of two end spring buttons 14. .Thezcentertspring bears against thee-flange 15 .ci a center spring button '16. 'At the 'upper endvof-eachiof; the re- ?cesses -12 there is a. lateralirecessw in which the fiangesJTa-nd 15 ofathewspringabuttonsare disposed and from vvhich they :extend -suffi- .ciently-iar to engage thelower-edge 8| .of-ihe jpressure rail. The upward movement of -the pressure railis by contact of-thecflanges of the buttons with "the top :surfaces of the lateralrecesses-fifl.

*the loweranvii and the :rail motion; rod.

motion 21's transferred to *a i switch :actuating plunger .83 through an adjustable plunger zstem -84. The ---adjustable' plungerrstem is-attached to the plunger. 83 .fby suitable screwtm'eads a-lock nut 86 beingprovided on the-stem {for locking the same in '-its adjusted gposition. ,Flattened surfaces 85 are provided near'ithe uppers-end of the stem for the IBCBDfiOIIiQfia, lwvrench. The .switch actuating plunger isslidably mounted within a 'su tablevbore -98 ji ormed within the 'ramfl. The. .lower end "of th s plunger is .-pro-- 'vi'ded with a flattened mortion 9| which .is formed at its extreme lower end with an in- UcJinBdJsuriaces-SZ. The flattenedqportiom Bifits within a slot-.93 formed in a laterally z'actua-ting surface 82 "of the :switch actuating 'plunger. The lateral actuating plunger-94 has sa' reduced .portion 1 00 to which sis-secured a switch actuating arm This arm'tis disposed"within'a "recess lflZiormedin the "face :of the ram'r24-and it is movable laterally withthelateral act-nabing :plunger :94, i being obvious that any reciprocating movement of the .,--switch iactuating 'plunger 83 will be transferred to l the lateral a actuating plunger 94 by thein'clined surfaces 52 and 96. Mounted about the reduced por Ths last mentioned plunger is. 'slidably d sposed within ea diametrically rarranged bore 95' formed in thereon-.24. The slot 93 terminates in an inclined surfaceifii-iarranged' preferably at the same-angleeas the inclined Ki l) tion I00 of the lateral actuating plunger 94 is a helical spring I03, one end of which bears against the shoulder I04 formed by the reduced portion and the other end against a bushing 1115. By means of this spring the inclined surface 96 of the lateral actuating plunger is main- -t'ained in firm contact with the inclined surface cured near its lower .end to the housing by means of brackets HI, .a...pivot pin Ill-serving .to .connectthe plate to the. bracket.

Means are provided on my zdeviceicr adjust- .ing the relative position, of the .contact point of the switch 106 with relation to the switch :arm I11 I. :These means-comprise an eccentric shaft 1H3 which is rotatablymounted within a sleeve H4. JIhe sleeve is carried by the housing-.20 and .bya mounting disc I I 15 which is suitably secured .to

vthe :outside .of the housing. .A groove H6 is formed in the shaft Hianda retaining ball I carried' within a bore 12 l formed in the mounting disc 5 engages-sa d groove for preventingend motion of said shaft. This ball is pressed inwardly by means of a helical spring 122 mounted within the bore l2l which. is held ingplace by means of escrow I23. At the inner. end of the shaft I 13 there is provided an operating button I24which is eccentrically mounted with :respect vto theshaft. The button bears against an actu- .rating block l25.-carried by the switch mounting A-spring H1, having .one end con- :nected to .the platellfl and the other -end ibo plate I l 0.

the housing, serves to keep theplate pressed against the button 24. -Byzrotating the shaft HBtheabutton I24 will be fmovedzaway fromor toward the ram .24, thereby governing the height of the finished rivet, as hereinafter described.

Secured adjacent to the mount ng disc -H5 .an index; disc 1.26. This .index disc is" formed with a plurality of recesses .130 arranged preferably .equidistantly. Adjacent the :outer index vsurface of the index disc l26is a regulating knob Hi. This knob carriesa-a spring-pressed detent .l32-which is engageablewith-rany one of the index recesses I of the index disc. This knob isfirmly secured to the shaft H3 and provides the means for rotating the shaft. Areg-ulating knob handle 133 is provided on the. knob to facilvitate its actuation.

The toggle latch 52 hereinbefore-referred-to is "arranged in .cooperativetrelationwith the lower :endof the toggle link extension .36. This "toggle latch is carried by a suitable toggle shaft 134 suitably mounted for-oscillation. .-A spring-arm I extends 'backwardly fromiitherzshaft and is :drawn downwardly :by means of a loading spring I49. A stop I36 limits the upward movement of the latch arm 5]. In therposition shown in-full l nes in Fig. 2, the latch arm 5| ispengaged with .the latch surface 46 ofthe'said :link extension, said arm being normally held in this position by means of :the spring 440, thereby limiting the normal downward working stroke .of the ram.

androtatablej with said shaft from its inopera-.

t'ive-full-line position of Fig. 2 to its operative .dotted-linepo'sition. The; shaft also carries an upstanding latch plate I43 which engages a latch pedal switch I44 when it is in its dotted-line posi-' tion. The upperend of the latch plate I43is provided with an eyelet I45 which is connectedto the outer end of the spring arm I 35 preferably by means of a flexible cable I46 and a latch release spring I50. Thelatch release spring I50 and the latch loading-S ing I40'are so proportioned that when the latch pedal is depressed, the tension produced upon the latch release spring I50 will overcome the tension of the latch loading spring I I40, placing an upward pull upon the spring arm of the toggle la'tch, thereby causing the toggle latch shaft I34 to be rotated in counterclockwise direction when the latch arm is released by the forward movement of the link extension- 36. The latch arm 5| is stopped-in its downward movementibymeans of an adjustable stop |5|.

.When the latch pedal MI is depressed to its lowermostv position the latch ,plate I43 will enage the latch pedalswitch I44, closing the cir- ,cuit to be hereinafter described and causing the link extension to be moved forwardly, thereby releasing thefrictional contact between it and. the

,latch arm just. above referred to. As thelatch arm 5| moves downwardly to its stop I5I, an adjusting screw I52 carried by the latch will contact the plunger I53 of a latch switch I54. thus closing a circuit efiecting the operation of the operating cylinder 4| to be hereinafter described.

The solenoid valve 45 is a standard article of manufacture and is provided with an intake I55 for connection to a. suitable source of air under pressure, andwith an exhaust I56 which is preferably connected to a muffler I60 so as to minimize the noise of exhaustfromthe operating cylinder. In the intake line 43 from the solenoid valve to the cylinder. I. preferably provide ,an adjust- .ing valve I6I which controls the flow of. the

exhaust from the front end ofthe cy inder when air is leaving it through the pipe 43, andthus controls the speed of operation of the ram 24..

' A relay I62 is also provided, by which the various switchesand circuits are controlled andsynchronized. This is also a standard article of manufacture and will not therefore. be further deto the relay as hereinafter described.

The relay I62 comprises a normally closedfcontact I04, a normally open contact I65 and a holding coil I66, as clearly shown in all of which are shown in diagrammatic manner in this figure. The relative arrangement of the latch switch I54, the stop switch I06, the foot switch I63 and the latch pedal switch I44 is also diagrammatically shown in this figure. A line j switch I10 for connecting the relay to the line current leads I61 and the operating coil I1I' of the solenoid valve 45 are also shown in this figure.

When my device is to be put into operation, the operator places his foot upon the foot switch I63 which closes the circuit through the normally closed contacts I64 of the relay and the coil I1I of the solenoid valve 45. This causes the solenoid valve to be actuated and air to be directed into J the cylinder behind the piston (not shown) for causing the piston rod 40 and'the link extension I to be forced forwardly, thus moving the toggle links 25 and 26 to their rivetin positions and moving the ram 24 upwardly, as shown in dotted lines in Fig. '2. n r

As shown by Figs. 3, 4 and 5, when the lower anvil 54 with its extended pressurerail 65 is first moved upwardly the pressure" r'ail 'contacts the workpiece sheets I12 being riveted, there being obviously sufilcient'rivet shank extending below thelowe'r surface of the bottom sheet to form a rivet head of the desired size and thickness when it is upset or flattened. When-the pressure rail has forced the sheets I12 together, the upward movement of the pressure railwill be stopped and the sheets'will be held together by the tension of the springs' 1|. After'theupward movement of the pressure rail ceases, the lower anvil Y 54 will continue its upward'movement toward the rivet and move relatively to the pressure rail' The pressure rail, which is bearing on top of the flange 15 of the middle spring button,'will therefore force the flange; 15 thereof downwardly against the tension of the Spring] I, thus moving it relatively to the lower anvil54 and the ram 24. Such relative movement will] be transferred through the plunger stem and switch actuating plunger 83. Since the lower inclined surface 02 of the switch actuating plunger is in contact with the similar surface 96 of the lateral actuating plunger 94, this relative" movement will be imparted to such lateral plunger. When the anvil 54 has moved upwardly the predetermined amount or'when it has been moved upwardly to a distance from the lower plate equal to the desired and predetermined thickness of the rivet head, the relative movementabove referred to will have moved the lateral plunger 94 outwardly. carrying its arm IOI toward the stop switch I06. This switch is a normally open switch as shown in the diagram in Fig.f10 and, since it is of a sensitive nature, very slight movement of the arm will cause it to be closed and thereby establish a circuit through holding coil I56 of therelay and-the foot switch I63. When the circuit? is closed through this switch I06, the relay will be actuated to open the normally closed contacts I64 and'simultaneously close the normally open contacts I65. When the current is interrupted I through contacts I04, the coil. I 1| of the valve 45 will be deenergized, thus allowing closing this valve and terminating the riveting operation. This will allow the ram .to rnove downwardly. When the contacts I65 are simultaneously closed,

current will flow through the connected circuit in parallel to the circuit established through the stop switch I06, and when the current is interrupted through the opening of the switch I06 until the operator takes his foot "off -.oi.the' foot .swit-ch I63, thereby allowing the ram to .con-

from the foot pedal.

contacts I65 and the holding coil-166,;the coil I1-l tinue its movement downwardly to the lower end .ofits stroke. Were it not iortheholding coil I66, the opening of the stop switch by the initial downward movement of the ram would .allow the ram to be reversed and again immediately raised,

unless the operator instantly removedhis foot However, by providing the of the solenoid valve is kept deenergized by the opening of the contacts I64 until the operator removes his foot from the switch I63 and again closes the same by depressing the pedal thereof. As shown in this schematic figure the latch pedal switch I44 is connected in parallel with thefioot switch I 63 and its closing by means of the operation of the foot pedal I4I has the same effectupon the operating cylinder as if the operator closed the foot pedal switch. -I63. Since it is necessary to release the friction between the latchsurface 46 of the link extension 36 and the engaging surface of the latch arm \I :before the latch .arm can be movedout of the way of the extension, the switch I44 :is provided and one operation of the pedal I4'I not onlyserves to place tension upon the spring I50 but. at thesame time serves to release the latch arm as just above described. When the latch pedal I4! is depressed, tension is placed upon the toggle latch arm 5I, as hereinbefore pointed-'outtand, upon the forward movement of the extension link .36 caused by the closing of the latch pedal switch I44, the latch arm 5I will be moved counterclockwise to its lower position (shown in dotted lines in Fig. 2). Just as soon as the latch is moved downwardly, the latch switch I 54 is closed. This switch, which is connected inparallel with the rivet control switch I06, serves to reverse the movement of the ram. Thiswill cause the extension 36 to be moved backwardly over the top of the depressed latch arm 5| to the position shown by the dot-and-dash lines in Fig. 2, thus lowering the lower anvil beyond the normal operating stroke and to a positionwhere-work requiring a greater opening between the anvils may be inserted. Just as soon as the link extension has passed backwardly to its backward position, the latch pedal MI is released which opens the switch I44 and allows the loading spring I40 to bring the toggle latch arm 5I back to its normal position as shown in'fu'll lines in Fig. 2. When the operator now places his foot upon the foot switch I63, the operating cylinder is again actuated to force the link extension forwardly. As the lower edge 50 of the extension link con- .tacts with and moves .over thelatch arm 51 it will cause said arm to be rotated counterclockwise. The parts are so designed that just-as the edge 50 passes over the top of the latch arm, the latch arm has been sufficiently depressed-so as to close the circuit controlled by the latch switch I54. The operating cylinder is thereby reversed in a manner similar to the reversal brought about by the actuation of the stop. switch I06, but before the link has had time to move back again to its rearward position, the latch arm 5I has snapped up in position behind it, thus setting the extension link and the toggle links in normal working positions where they are ready to go through the regular riveting stroke when the foot switch IE3 is again depressed.

In the modified form shown. in Fig. 11 the stop switch I is carried by a slidable switch plunger I16. This plunger is carried by a guide sleeve I80 having an integralannular flange :IBI which is secured to a boss 1.82 ecarried :by

the ram housing I83,

In this form of the invention the boss I82. is

termed on the exterior .of the machine where the parts of the switch controlling mechanism are accessible to direct adjustment. The switch I15 is mounted'within a recess I84 formed in the boss and opening up into the bore in the housing for the ram 24. The contact button I85 of the switch extends inwardly toward and in contact with the switch actuating arm IOI as in the other form of the invention. The

switch plunger I16 is slidably mounted within a bore 186 formed in the guidesleeve I80. So as to prevent rotation of the plunger I16 .a feather screw I is provided which is carried by the guide sleeve and extended into the bore I86 where it .engages with a keyway I9I formed in the switch plunger. The switch plunger and the switch are kept in their outward positions .by means of a 'helicalspring I92 arranged to have one end contacting with the switch I15 and the other end with a switch arm I93 carried by the housing and extending upwardly to a point opposite the switch. The arm carries a retaining pin I94 which passes through the center of the spring to maintain it in position. The guide sleeve I80 is formed in its outer end with in- .terior screwthreadsI94 for the receptionof an adjusting screw I95. This adjusting screw has a stud I96 engaging the outer face of the switch plunger I16, and at its opposite end it is formed with a guide stud 200. This stud is disposed within a bore 20I formed in an adjusting knob 202. The adjusting screw is held in place within the knob by engagement of the stud 200 with the bore 20I and by means of rivets 203 which pass through the adjusting screw I95 and the outer wall of the knob whereby the screw and knob are rnade a unitary structure. The knob is thus rotatable relative to the guide sleeve I80 and the position of the plunger I16 at which the switch I15 will make contact is adjusted by rotation of the knob. When turned in one direction the switch plunger I16 will be moved inwardly. When the screw isbacked away the spring I92 will force the plunger and switch backwardly against the screw. The adjusting knob 202 is formed with an annular recess 2.04 in its inner face which provides a flange 205 for concealing the flange I8I of the guide sleeve and also the screws which secure the same in place. Suitable index markings (not shown) are carried on the flange 205 which provide definite indication of the adjustment .of the knob. A number of spring-pressed detents 206 are carried by the boss I82 and the flange of the guide sleeve I80 for engagement with suitable recesses 2l0 formed in the inner face 2 of the adjusting -knob. A helical spring U2 .is provided for each of the detents.

tation therewith preferably by means of a .key-

way 220 formed in-the anvil with which a detent ball 22! is engageable. This ball is carried by the pressure sleeve and is maintained .in position by means of a screw 222. The pressure sleeve is forced upwardly by means of .a helical spring 223 which is mounted about the anvil pressure sleeve. I a V with a'screw arm 225 which carries an adJust- 2,865,147 and has it upper endpreferably disposedwithin a recess 224 formed in the lower end of the The pressure sleeve is provided ing screw 226. .The screw is passed through the arm-and has a lock nut 230 disposed on one side of the arm. By means of this screw the point at which contact is made with the stop switch 232 is accurately controlled. The contact switch is carried by a bracket 233 secured to and carried by the ram 2l6.

In this form of invention as the ram upwardly toward the workpiece (not shown) and against the upper anvil (not shown) the pressure sleeve 2|! contacts the workpiece and compresses the pieces thereof/firmly together, after which further upward movement. of the ram will cause the lower anvil 2l5 to move upwardly relative to the pressure sleeve and cause the rivet to be upset, When the rivet has been upset the predetermined amount, or until the space between the lower anvil and the faceof the workpiece is at a'predetermined distance, the adjusting screw 226 will contact the switch 232 and close the circuit, thus causing the operating means to be interrupted as hereinbefore described in connection with the other igrm of invention.

While I have described the use-of air in the operation ofv the operating cylinder, it is obvious that oil or other fluid may be used. Furthermore, while I have described the form of Fig.- 13 as applied to a single rivet, it is obvious that this invention is also applicable to a multiple riveter. These and other modifications of the details herein shown and described may be made without departing from the. spirit of my invention or the scope of the appended claims and I do not, therefore, wish .to be limited to the exact embodiment herein shown and described, the form shown being merely a preferred embodiment thereof.

vHaving thus described my invention, what I claim is:

, l. A riveting machine, comprising a stationary 45 operating means for said movable anvil includanvil, a movable anvil slidable relatively thereto,

ing an upper toggle link and alower toggle link, a link extension carried by said upper toggle link,

latchmeanslengageable with said link extension to limit the movement of th toggle link to a normal operating stroke, and latch release means for releasing the toggle links for movement to their maximum-stroke. i

2. A riveting machine, comprisinga stationary anvil, a movable anvil slidable relatively thereto, operating means for said movable anvil including an upper toggle link and a lower toggle link, a link extension carried by said upper toggle link, latch means engageable with said link extension to limit the movement of the toggle link to a normal operating stroke, latch release means, a latch pedal switch associated with said release means for causing the operating means to travel on its riveting stroke, and a latch switch asso-' ciated with said latch meansior causing said opposite said stationary anvil. and slidably mounted in said housing, a movable anvil carried by said ram, means for reciprocating said ram, a pressure rail slidably mounted upon said movable anvil and movablerelatively thereto, a

is moved switch actuating plunger slidably carried by said ram, a lateral actuating plunger slidably mounted in said ram, said switch actuating plunger and said lateral plunger being connected so that movement of the switch actuating plunger is transmitted to the lateral actuating plunger, a switch mounting plate pivotally carried by the housing opposite the lateral actuating plunger, an electric switch carried by said plate, means for adjusting the position of the plate and switch, and actuating means connecting said switch with said ram reciprocating means.

4. Ariveting machine,- ,comprising a stationary anvil, I a movable anvil slidable relatively thereto, operating means for said movable anvil including an upper toggle link and a lower toggle link, a link extension-carried by said upper toggle link, latchmeans engageable with said link extension to limit the movement ofithe toggle link to a normal operating stroke, latch release means, a latch pedal switch associated with said release means for causing the operating means to travel pressure railslidably mounted upon said movable anvil and movable relatively thereto, a. switch on its riveting strokefa latch switch associated with said latch means for causing said operating means to travel on its non-riveting stroke, a loading spring for holdin said latch means in its normal position, and a latch, release spring for counteracting said loading spring;

5. A riveting machine, comprising a housing, a stationary anvil carried by said housing, a ram opposite said stationary anvil and slidably mounted in said housing, a'movable anvil carried by said ram, means for reciprocating said ram, a pressure rail slidably mounted'upon said movable anvil and movable relatively thereto, a rail motion rod-carried by said movable anvil and actuated by the relative movement between said pressure rail and said movablejanvil, a switch actuating plunger slidably carried by said ram, an adjustable plunger stem carried by said actuating plunger and coacting with said rod, and actuating means, including a switch, for connecting said plunger to said ram reciprocating means for terminating the riveting operation.

6. A rivetingmachine, comprising a housing, a

stationary anvil carried bysaidhousing, a ram opposite said stationary anvil and slidably mounted in said housing, a movabl anvil carried by said ram, means for reciprocating said ram, a pressure rail slidablymounted upon said movable anviland movablerelatively thereto, a rail motion rod actuated by the relative movementbetween said pressure rail and-said movable anvil, a switch actuating plunger carried by said ram, a lateral actuating plunger slidably mounted in said ram, an adjustable plunger stem carried by said switch actuating plunger and coacting with said rail motion rod, said switch actuating plunger and said lateral plunger being.

connected so that movement of the switch actuatingplunger is'transmitted to the lateral actuating plunger, and actuating means connecting .said ram reciprocating means with said lateral actuat ingplunger for terminating the riveting opera tion.

'7. A riveting machine, comprising a housing, a stationary anvil carried by said housing, a ram opposite said stationary anvil and slidably mounted in said housing, a movable anvil carried by said ram, means for reciprocating said ram, a

actuating plunger slidably carried by said ram,

'a lateral-actuating plunger slidably mounted 1 in said ram, said switch actuating plunger and movement of the switch actuating plunger is transmitted to the lateral, actuating plunger, an adjustably mounted electric'switch carried by said housing, and actuating means connecting said switch with said ram reciprocating means.

8. A riveting machine, comprising a stationary anvil, a movable anvil slidable' relatively thereto, operating means for said movable anvil including an upper toggle link and a lower toggle link, a link extension carried by said upper toggle link, latch means eneageable with saidmeans associated with said-riveting means for limiting the relativemovement between said anvils', to determine the thickness of the rivet head being formed, said riveting means being movable relatively to said dimensional control means-upon engagement of the surface ofthe workpiece, said control means including stop means responsive tothe' relative movement between said riveting meansand said dimensional control means as determinedb'y' rivethead thickness for arrest ingtheoperation of said riveting means.

10; A riveting machine, comprising riveting means including a pair of relatively movable an vils, means' for opera-ting said riveting means, a

pressure rail slidably-carried by one of said anvils and engagea-b'le Withthe workpiece during riveting operation, said rail being movablerela-' tively to the anvil--carrying-tlie same to effect riveting operation, an electric control switch, and

means connecting said rail to said switch for actuating the latter, said switch andsaid con-' necting" means being responsive to the relative movement between said rail'andthe 'anvil car: rying the same as determin'ed by rivet head thickness for arresting the operation of'said riveting 11. A riveting machine, comprising riveting means including a pair of relatively movable anviIs, means for operating said riveting means, a' pressure railslidably carried by one of said anvils and engageabie with the workpiece during" riveting'operation, said rail being movable 're'l a tivel y to the-anvil carrying the same to efiect rivetingoperation, an electric control switch, means connectng' said railio saidswitch for actuating the latter, said switch and saidconnecting means being responsive to the relative movement be tween-'said rail and the anvil carrying the same asdeterinined by rivet'head thickness for arrest-'- ing the operation of said riveting means, and means for adjusting the posit-ion of said switch with respect to the relative movement between" the rail and theahvi'l carrying thesame."

:12. In a rivetingmachine, the-combination withrelatively movable riveting anvils, of dimensional control meansrassociated with one of said anvils. fcr'limiting the relative movement be'- tweensaidanvils to determinethe thickness ofthe rivet head i being formed; said dimensional control means being movablexrelatively to income of the anvils'upon contact with the surface-of the workpiece, saidzcontrolmeans including stop fii'fiii if said lateral plungerbeing connected so that means responsiv -tomere1ative mo'vementbe tween said' one anvil and said dimensional con-- trol means as determined Icy-rivet head-thickness foif'arresting the operation of" said riveting 13'. A riveting'machine; comprising a housing; upper andlower fixed jaws carried-by the hous= ing; a stationary anvil carried'by' said upper jaw,

a ram slidably carried' by said lower'jow, a'movablean'vil carried by saidram, operating means for said ram for effecting a rivetingoperation; dimensional control means to" control the thickness'" of"tlierivet head being formed, said con tr'ol means'comprising'a movable member mov able -relatively tooneof said anvils upon contact with the surface of-'a'w'orkpiece-, an electric stopswitclrfor arre'sting said operating means; means carried by said rain for transmitting the relative' movement between" said' movable member andpne'of'said anvi'lsto said switch, andmeans connecting,- said switch with said operating means"for'interrupting'said operating means and thereby terminating the riveting operation;

' 14". A riveting'rnachine; comprising ahousing, upper and lower fixed jaws carried by-thehpusing; astatioiiary anvucarried by said upper jaw, a" ram slidably carried'b'y said lower jaw; a movable anvil carried by said ram, operating-means for'said-ram for' eifecting'a riveting operation, dimensional control means carried-by saidmovable anvil to controlthe thickness of the rivethead beingformed, said control means comprisinga member'movabl'e relatively to such anvil upon contactwitn thes'urface oi'a workpiece, an"e1ectric" s'top* switcnror arresting said oper atmgmeansme'aii carried by said ram for transmitting the" relative" movement between said movable member and said movable anvil to said switch, and means connecting said switchwith said operating means for interrupting said opcrating means and tl'iere'loy terminating the riveting operation. v e

15'; A riveting machine; comprising'a stationary anvil, a movable anvil slidable relatively" thereto; dimensional control means to control the thickness of the rivet; head being formed, said control fmea'ns comprising a movable member for contact with theaadjacent surface of a work piece, one of said'anvils havingrelativemove- .ment with said movable member, operating means for said movable anvil including an upper toggle link and a lower toggle link, a link extension carried by said upper'toggle link, latch means-engageable with said link'ext'ension to limit the-movement of the toggle links to a normal operating stroke; andlatch release means for're1easingthe-toggle links formovement to theirmaximurn-stroke, said control means further' comprising stop means including an electric switch coacting with said operating means and actuated by the relative "movement between said movable-member andsaid movable anvil for determiningthe total movement of saidmovable anvil.

'16. A r'ivetingmachine; comprising a housing, a stationary anvil carried bysaid'hcusing, a-ram opposite Said stationary anvil and slid'abl y' mounted in said housing, a movable anvil can ried by said ram; means for reciprocating said ram to efiect a" riveting operation; dimensionalcontrol means to'c'ontrol the thickness of the rivet head being formed, said control means com rising a movable member for contact with the adjacent;surraceor a workpiece, one of said an! vlls having relative movement with said mowable member and a stop switch carried by said housing and in coacting relation with said movable member, and switch regulating means carried by the housing for controlling the position of said rivet control switch, comprising an eccentric shaft, an eccentric button carried by the shaft and coacting with said rivet control switch, and means forfastening said eccentric shaft in its adjustedposition.

17. A riveting machine, comprising a housing,

a stationary anvil carried by said housing, a ram, opposite said stationary anvil and slidably mounted in said housing, a movable anvil carried by said" ram, means for reciprocating said ram, dimensional control means to. control the thickness of the rivet head being formed, said control means comprisinga movable member for contact with the surface of a workpiece and a stop switch associated therewith, one of said anvils having relative movement with said movable member, a switch plate pivotally carried by said housing, said stop switch being rigidly carthe thickness of the rivet head being formed,

ried by said plate, an eccentric shaft carried by.

said housing, an eccentric button carried by the shaft and coacting with said switch plate, and

means for fastening said eccentric shaft in itsv and a lower toggle link, a link extension carried bysaid upper toggle link, latch means engageable with said link extension to limit the movement ofthe toggle links to a normal operating stroke, latch release means for releasing the toggle links for movement to their maximum stroke, a loading spring for holding said latch means in its normal position, and a latch release spring for counteracting said loading spring, said controlmeans further comprising actuating means connecting said movable member with said operating means for interrupting said operating means'and terminating the riveting operation. l9. Ariveting machine, comprising a housing, a stationary anvil carried ,by said housing, a ram opposite said stationary anvil and slidably mounted in said housing, a movable anvil carriedby said ram, means for reciprocating said ram, dimensional control means to control the thickness of the rivet head being formed, said control means comprising a movable member for contact with the sugface of a workpiece, one of said anvils having relativemovement with said movable member, a stop switch carried by'said housing for cooperation with said dimensional control means, a switch actuating plunger carried by said ram, a lateral actuating plunger slidably mounted in said ram, said switch actuating plunger and said lateral actuating plunger each being formed with inclined coacting surfaces, and actuating means connecting the ram reciprocating means with the lateral actuating plunger for interrupting said operating means .and terminating the riveting operation.

20. A riveting machine, comprising a stationary anvil, a movable anvil slidable relatively thereto, dimensional control means to control the thickness of the rivet head being formed, said control means comprising a movable memberfor contact with the surface of a workpiece,

oneof said'anvils having relative movement with said movable member, operating'means for said movable anvil including an upper toggle link and a lower toggle link, a link extension carried by said upper toggle link, latch means engageable with said link extension to limit the movement of thetoggle links to a normal operating stroke, and latch release means for releasing the toggle links for movement to their maximum stroke,-

said control means further comprising actuating means connecting said movable member with said operating means for terminating the riveting operation. V a

21. A riveting machine, comprising a station ary anvil, a movable anvil slidable relatively thereto, dimensional control means to control said control means comprising a movable member for contact with thesurface of a workpiece,

one of said anvils having relative movement with said movable member, operating means for said movable anvil including an upper toggle link and a lower togglellink, a link extension carried by said upper toggle link, latch means engageable with said link extension to limit the movement of the toggle links to a normal operating stroke, latch release means, a latch pedal switch associated with said release'means for causing the operating means to travel on its riveting stroke, and

a latch switch associated with said latch means for causing said operating means to travel on its non-riveting-stroke, saidcontrol means further comprising actuating means connecting said mov r able memberwith said. operating means for terminating the riveting operation. a

22. rivetin machine, comprising a stationary anvil, a movable anvil slidable relatively.

,' movable anvil including an upper toggle'link and a lower toggle link, a link extension carried by said upper toggle link, latch means engageable with said link extension to limit the movement of thetoggle links to a normal operating stroke, latch release means, a latch pedal switch associated with said release means for causing the, operating means to travel on its riveting stroke,'a latch switch associated with said latch means forcausing said operating means to travel on its non-riveting stroke, a loading spring for holding said latch means in its normal position, and a latch release spring for counteracting said loading spring, said control means further comprising actuating means connecting said movable member with said operating means for terminating the riveting operation.

23. A riveting machine, comprising a stationary anvil, a movable anvil slidable relatively thereto, dimensional control means to control the thickness of the rivet head being formed, said control means comprising a movable member for contact with the adjacent surface of a workpiece, one of said anvils having relative movement with said movable member, operating means for-said movable anvil including an upper toggle link and a lower toggle link, and a link extension carried by said upper toggle link, said control means further comprising stop means including an electric switch coacting with said operating means and actuated by the rela,

and said movable anvil "for determining the-total movement of said: movableanvil; v

24. A-riveting machine; comprising a pair of relatively movable anvils, operating meansassociated'withsaid-'anvils foreffecting a riveting operation, movably mounted dimensional controlmeansto controlthe thickness or the rivet' headbeing formed, said control means comprisinga movable member-arranged adjacent one *of said anvils and'engageablewith one of "the-sun faces ofaworkpiece; one'of said anvils being movable relatively to said movable member; and arresting means actuated by and during the-relative movement between said dimensional controlmeans andtheanvil associated therewith for interrupting said control means and thereby terminating the riveting operation;

25. A riveting machine, comprising apair of relatively movable anvlls; operating means assooiated' with saidanvils for effecting; a riveting operation,- and dimensional: controlmeans associated -with said operating means and'movable relatively to oneof said anvils upon contact with the surface of a workpiece for determining the thicknessof the rivet head.

26'. A riveting machine, comprising -a pair'off relatively movable anvils, operating: means associated with said anvils for causing a projecting rivet body to be upset and formedinto a. rivet head against the surfaceof'a workpiece, and. dimensional control means'engageable' with the surface of the workpiece against which the-rivet head is formed, said means having; relative movement with one of said anvils upon contact with said surface for interrupting said operating means when said formed head-has reached its predetermined thickness;

27. A' rivetingmachine, comprising-a pair of relatively movable anvils, operating means associated with said anvils for'causingaprojecting rivet body to be upset and formed intoa rivet head against the surfaceofa workpiece; and dimensional control means for determining; the

erating means for interrupting'th'e lattenwhen: the rivet headhas reached a:- predetermined:

thickness;

23885147 7 tive movement betvveensaid" movable memben 282 A riveting machinee'comprising a palr'of relatively-movable anvils; operating-means associated with" said 'anvils for "causing a project ingrivet body to be upset and formed into a rivet head against the surface of" a workpiece; and" dimensional control means for determining the thicknessof the rivet'h'ead being formed, said" control means being carried by, one of said an-- vils and movable relatively to such anvil, saidcontrol means being engageable with the surface ofthe workpiece against'which the rivet head is-formed and including means having relative movementfwithone of said anvils upon contact with said surface for interrupting said operating meanswhen said formed head has reached its-predetermined thickness.

29. A riveting machine, comprising a pairof' relatively movable anvils', operating means associated "with said anvils for causing a projectingrivet body-to be upset and formed into a rivet head against the surface of a workpiece, and dimensional control means for determining the thickness of the rivet head being formed, said control means comprising-a movable member engageable with the surface of the workpiece against which the rivet head is formed, said member having relative movement with one of saidanvils upon contact with said surface, said controlmeans being-associated with said movable memb'erand said operating means and including an electric switch'connected with said operating means and actuated by the relative thereto, operating means for said movable anvil" forcausi'ng' a projecting rivet body to be upset and formed into a rivet head against the surface-of a workpiece, and dimensional control means for determining the thickness of therivet head beingformed',- said control means comprising 'a movable member carried by said movable anvil: and movable relatively to said movable an viliupon contact with the surface of the work-'- piece against which the'rivet'head is formed,

sald -conrtol. means being associated with said movable member and said operating means'for interruptin the latter when the rivet headhas" reached apredetermined thickness.

THOMAS H. 'SPELLER. 

